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Abrasion resistant fluoropolymer compositions containing zeolite

A technology of fluoropolymer and composition, which is applied in the direction of instruments, electric recording technology using charge pattern, coating, etc., can solve the problem of fluoropolymer wear resistance, polymer isolation performance, and application of fused roll cover layer without disclosure And other issues

Inactive Publication Date: 2007-05-02
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the literature disclosing the advantages of incorporating zeolite additives in fluoropolymers does not address the problem of improving the abrasion resistance of fluoropolymers while maintaining the barrier properties of the polymers, nor does it disclose any application to fusion roll covers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1, Abrasion Resistance of Fluoropolymers and UMB

[0061] A number of wafer substrates cleaned and primed were prepared as described above. Apply topcoat over primed substrate. The topcoat formed in Example 1 had the components shown in Table 2 below. The ultramarine blue (UMB) loading rate was varied from 0 wt% to 20.0 wt% of the dry film. The wear test results of the samples tested by the above-mentioned thrust wear weight loss method are shown in Table 3 for different UMB contents.

[0062] Addition ratio of ultramarine blue in dry film wt%

0.0

4.0

8.0

12.0

16.0

20.0

Fluoropolymer

PFA dispersion

37.9

37.9

37.9

37.9

37.9

37.9

PFA powder

12.3

12.3

12.3

12.3

12.3

12.3

solvent

water

24.5

23.0

21.3

19.5

17.5

15.3

...

Embodiment 2

[0077] Embodiment 2-Ultramarine blue modification

[0078] Aluminum test rolls (10.5 inches, 26.7 cm long; 1.125 inches, 2.9 cm diameter) were coated with a coat of primer as described above and baked at 150°C for 5 minutes. The dry film thickness (DFT) of the primer layer is about 8-12 microns. Apply Topcoat 2 with Ultramarine Blue and bake at 800°F (427°C) for 10 minutes. The total dry film thickness (DFT) of the coating was 35-45 microns. The coating had a result of 3814 cycles / micron wear when tested in the roll wear test described above. The coating was subjected to the barrier test described above by testing on a commercial copier Ricoh AF 350. Electrophotographic toner contamination occurs after about 50,000 copies due to coating wear.

[0079] Comparative Example A

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PUM

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Abstract

The present invention provides an abrasion resistant overcoat composition comprising fluoropolymer and an effective amount of zeolite to increase the abrasion resistance of a film formed from the composition by at least 25% as compared to film formed from the fluoropolymer by itself. The invention also provides for a process for increasing the abrasion resistance of a fluoropolymer film coating on a fuser roll, by forming a film of fluoropolymer with an effective amount of zeolite sufficient to increase the film's abrasion resistance.

Description

field of invention [0001] The present invention relates to fluoropolymer compositions containing additives that enhance the abrasion resistance of films formed from the compositions. Background of the invention [0002] The superior stability of fluoropolymer resins to light, heat, solvents, chemical attack and electrical stress imparts desirable properties to articles made from these polymers or substrates coated with films of the polymers. Such resins, particularly perfluoropolymer resins, are well known for their low surface energy and release / non-stick properties. Mechanical properties such as abrasion resistance can be improved by incorporating additives into these resins to extend their life, but such additives can weaken the polymer's barrier properties. [0003] An important application of fluoropolymers is in electrophotographic copying, where electrostatically charged xerographic powders are fused to a receptor (eg, paper or film) to convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20C08K3/34C08L27/12C09D127/12C08J5/18C08K3/04
CPCC08K3/04C08J2327/12C08J5/18C08K3/34C09D127/12C08L27/12
Inventor L·W·麦基恩
Owner EI DU PONT DE NEMOURS & CO
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